What is the distinction between primary and secondary data? when is primary data needed?p155 2. [slightly longer question]: briefly define each of the following types of data: demographic, attitudes, psychographics, intentions, knowledge, motivations and behaviors. p156- 9 3. for your project, use at least two of these characteristics (from the previous question) to classify some your items. depends on your specific questions 4. what is the distinction between communication and observation methods of data collection? what are the advantages/disadvantages of each?p159-160 5. what is meant by the term survey methods? briefly define three such methods.